Scientists from the University of Delhi have rediscovered a new genus of Old World tree frogs, which currently contains over 380 species, some of which include fairly ambiguous classifications that were created based on shared morphology characteristics. The rediscovered genus frog was believed to be extinct for over 100 years, according to The Guardian.
The team made the discovery after doing fieldwork in four northeastern Indian states that lead to the observation of several populations of tree frogs with many unusual characteristics, one of the most surprising being tadpoles that eat their mother's eggs.
In order to determine the phylogenetic relationship of the newly discovered frogs, the team of researchers gathered molecular data and compared it to currently known tree frog genera. The analysis led to the identification of a distinct evolutionary frog genus that they named Frankixalus.
"This genus probably remained unnoticed because of its secretive life in high canopy tree holes," Sathyabhama Das Biju, who headed the research, said in a press release. "Since the new genus shows remarkable parental care behavior with specific microhabitat requirements for their survival, populations discovered from highly disturbed forests are already facing extinction threats."
In addition to the egg eating mentioned above, some other unique characteristics of this new genus include gel-encapsulated eggs, laying eggs on the walls of tree holes and breeding in holes with water accumulation, as well as a unique external appearance and skeletal shape.
The findings were published in the Jan. 20 issue of PLOS One.
